Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
02558 Graphics Minor Always Feb 5, 1997, 00:00 Apr 1, 2009, 19:06
Tester -MAME Source- View Status Public Platform
Assigned To Kale Resolution Fixed OS
Status [?] Resolved Driver
Version N/A Fixed in Version 0.130u3 Build
Fixed in Git Commit Github Pull Request #
Summary 02558: Graphic priority is not fully understood.
Description Fully understand priorities, chances are that it just uses a mix between the priority number and 1+ prom(s);
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Additional Information
Github Commit
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parent of 02557ResolvedKale All games in jalmah.c: There are square gaps during gameplay. 
related to 03087ResolvedKale  daireika: Graphic artifacts on attract mode. 
User avatar
Dec 15, 2008, 16:33
edited on: Dec 15, 2008, 16:44
The priority system of this one is complex like the Jaleco Mega System 1 HW. Candidates to work out are the mj15 prom,the priority number in the video registers and the color offset in tilemaps. And,it's not a "possible" bug,it's a sure bug. The most obvious priority artifact is on Mahjong Daireikai hi-score screen,correct.png is how it should look,wrong.png is the current implementation (and yes,it's regressed because of the dynamic tilemap paging hook-up)
User avatar
Apr 1, 2009, 19:06
edited on: Apr 1, 2009, 19:12
Priority system fixed (thanks also to Uki and Yasu), but the related snaps on this bug report aren't, moved the snaps to bug report 3087.